Rigorous analysis of acousto-optic interactions in optical waveguides

Abstract

Stimulated Brillouin Scattering (SBS) is a nonlinear process between interacting light and sound waves. For an accurate analysis of the interaction between the guided optical and acoustic modes, a rigorous yet computationally efficient numerical approach is needed. A finite element based full-vectorial approach was developed to find modal solutions of acoustic modes in low and high-index contrast waveguides. The SBS frequency shift, the overlaps between the quasi-TE fundamental optical mode the fundamental and the higher order quasi-shear and quasi-longitudinal acoustic modes, and SBS gain curves are also presented.